SAP CRM TRANSACTIONS

Hi,

Can some one help me..

I'm creating an opportunity from service confirmation during the process various pop up are coming for various partner function and for selecting which all line items from confirmation to be made into opportunity,after creating the final opportunity the quantity for the sub line line item for the main line item 100 (101 and 102 quantity is getting doubled ).This is applicable for the rest of the main items (200,300...etc)